Since It Seems To Be Champ Amp Month...

[DummyLoad]

Dusting this project off...My spin on a 5E1 - EL34 output tube. Going to sub in a 12BZ7 to shoot for maximum gain with this ckt.

I haven't built a Champ into a chassis/cabinet yet. No Champ amp shall go unmodified. I may actually build this one. 

Fairly quiet amp, even on the breadboard.


--Pete

[DummyLoad]

El Champ on the BB

[tubeswell]

Impressive breadboarding going on there

[DummyLoad]

Impressive breadboarding going on there

Thanks Pete!

--Pete

[Williamblake]

Very nice breadboarding, indeed. Is the a special name for that kind of terminals?

[DummyLoad]

Very nice breadboarding, indeed. Is the a special name for that kind of terminals?

Two row barrier strips -or- Double row barrier strips. The ones I use are on .375" (9.5mm) centers. The ones I use specifically are becoming increasingly difficult to find, as I require what's called a wire clamp screw, or sometimes also called a wire captive screw. To circumvent, I buy the 20 position model and buy the wire clamp screws from another source. beware that some barrier strip screws are metric, most are 6-32 screws, but some are also metric, typically M3.5x.06x6mm screw - Links below to a source for both metric and inch pattern clamp screws and barrier strips.

https://www.mpja.com/Pack-of-10-6-32-Screws-with-wire-clamp-for-Power-Supply/productinfo/31980%20HD/

https://www.mpja.com/Pack-of-10-Screws-m35-06-with-wire-clamp-for-Power-Supply/productinfo/31981+HD/


Metric:
https://www.allelectronics.com/item/ts-210/dual-row-barrier-strip-20a-10-circuit/1.html

Inch:
https://www.newark.com/multicomp/mc24323/terminal-block-barrier-20-position/dp/14N5652?gclid=CjwKCAjw6raYBhB7EiwABge5KhNcWqvtK1FqWQL7lvPrKVuZ08gJ5echaxTDnBm6am8SBaxo3Rrq8BoCOb8QAvD_BwE&mckv=_dc|pcrid||plid||kword||match||slid||product|14N5652|pgrid||ptaid||&CMP=KNC-GUSA-GEN-Shopping-PMAX-Med-ROAS

https://www.digikey.com/en/products/detail/molex/0387700320/3301061

Google search for "two row barrier strip" and you'll have more hits than you'll have time to sort through.

--Pete

[SILVERGUN]

Impressive breadboarding going on there

That IS the most adorable little breadboard I have ever seen 
You should tell the guy who labels your BBs that you are using an EL34 this time.  Is he the same guy who cuts your lawn?

[66Strat]

GREAT IDEA for bread boring. I bought one of those strips yesterday at the big box store to fix a control wiring mess by the A/C technician.

[PRR]

....I bought one of those strips yesterday ...to fix a control wiring mess by the A/C technician.

I got a "trailer junction box"--
https://www.amazon.com/MICTUNING-Way-Electrical-Trailer-Junction/dp/B07QDQRX7P
7 studs is enough for most heat/AC thermo-control wiring, box protects against paint-cans and dead amps shoved against the furnace. Run of CAT-6 net-cable from the furnace computer terminals to this box outside and up at working level (my furnace PCB is hardly off the floor). Side-run for the hour meter and condensate pump shut-down.

[DummyLoad]

Impressive breadboarding going on there

That IS the most adorable little breadboard I have ever seen 
You should tell the guy who labels your BBs that you are using an EL34 this time.  Is he the same guy who cuts your lawn?

Nah, he's the guy that plays the stratocaster while on fire...    

--Pete

[66Strat]

....I bought one of those strips yesterday ...to fix a control wiring mess by the A/C technician.

I got a "trailer junction box"--
https://www.amazon.com/MICTUNING-Way-Electrical-Trailer-Junction/dp/B07QDQRX7P
7 studs is enough for most heat/AC thermo-control wiring, box protects against paint-cans and dead amps shoved against the furnace. Run of CAT-6 net-cable from the furnace computer terminals to this box outside and up at working level (my furnace PCB is hardly off the floor). Side-run for the hour meter and condensate pump shut-down.

I'm replacing a Carrier thermostat. It's a two board control; one at the furnace, and a separate board at the thermostat. I re-purposed the cover for the board at the furnace to house the terminal strip.

[shooter]

my Champ'ish perversion
I didn't use HIGHGAIN tubes so there's more than 2 
always ASUME my schematics have flaws (it may be a rev or 6 behind also) 

[SILVERGUN]

my Champ'ish perversion

Now that's a real man's output tube there.

I think DL should have to call his the El Chumpo  (after the weak younger skinny cartel brother)

[DummyLoad]

my Champ'ish perversion
I didn't use HIGHGAIN tubes so there's more than 2 
always ASUME my schematics have flaws (it may be a rev or 6 behind also) 

No but 18⁴=104976 overall gain of your preamp;
beats my lowly pair of triodes... 50²=2500 - you win!   
However, I have 1 less tube to wire filaments to, so I win!   

--Pete

[shooter]

 
IIRC the last stage became a CF on the 2nd tweak-round
and
I did catch the big tube bug from some of your "lets see what a pair of 120's runnin hot....." experiments


win or lose, it's all about stealin circuits 
(the pre-is a molested steal from Steves juke-box build)

this one did make it into the wild, always a good indicator, I got close enough 

[DummyLoad]

my Champ'ish perversion

Now that's a real man's output tube there.

I think DL should have to call his the El Chumpo  (after the weak younger skinny cartel brother)

Ha! EL Chumpo? No! KT ChampMacho Señor!

 

[SILVERGUN]

Looks like you've got more cojones than el buen sentido there Ese


I can still see the EL in the pic so I know this was just a photo op = busted

[shooter]

looks like there's someone stuck inside your tubes trying like hell to get his magic rectangle to help escape 
buenos no-chez seenyourz

[Electron Tornado]

El Champ on the BB

Nice breadboard! Have you seen these?


https://www.ebay.com/itm/152240765977

{edit- trimmed eBay tracking data -- PRR}

[DummyLoad]

El Champ on the BB

Nice breadboard! Have you seen these?

Yes, and thanks!


--Pete

[SILVERGUN]

El Champ on the BB

Nice breadboard! Have you seen these?

Yes, and thanks!


--Pete

I think you meant to say "Thanks, and yes!"

[DummyLoad]

El Champ on the BB

Nice breadboard! Have you seen these?

Yes, and thanks!


--Pete

I think you meant to say "Thanks, and yes!"

Yes, thanks! :p

--Pete